Alarm Heat Pump Z1 Internal compressor driver fault 1

What does 5395 mean?

This alarm indicates an internal fault with the compressor driver in Heat Pump Z1. It triggers after 3 warnings within 3 hours, or if a warning remains active for 30 minutes.

• Too low temperature in the heating system.
• Poor heat transfer to the cooling coil.
• Defective sensor TL2.
• Defective inverter (if the alarm is repeated).
• Failure or short circuit in cabling between the inverter and compressor.
• Electrical fault in the compressor.

Click steps to track your progress.

1. 1

   Ensure that enough thermostats on your heating system are open to allow proper heat circulation.

2. 2

   Check the screw union connections to the cooling coil for tightness.

3. 3

   If the alarm persists, contact a qualified technician as it may indicate an inverter or compressor issue.